109 lines
3.2 KiB
Java
109 lines
3.2 KiB
Java
/*
|
|
* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
|
|
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
|
|
*
|
|
* This code is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 only, as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This code is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
* version 2 for more details (a copy is included in the LICENSE file that
|
|
* accompanied this code).
|
|
*
|
|
* You should have received a copy of the GNU General Public License version
|
|
* 2 along with this work; if not, write to the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*/
|
|
|
|
/**
|
|
* @test id=default
|
|
* @summary Do not suspend virtual threads in a critical section.
|
|
* @bug 8311218
|
|
* @requires vm.continuations
|
|
* @library /testlibrary
|
|
* @run main/othervm SuspendWithInterruptLock
|
|
*/
|
|
|
|
/**
|
|
* @test id=xint
|
|
* @summary Do not suspend virtual threads in a critical section.
|
|
* @bug 8311218
|
|
* @requires vm.continuations
|
|
* @library /testlibrary
|
|
* @run main/othervm -Xint SuspendWithInterruptLock
|
|
*/
|
|
|
|
import jvmti.JVMTIUtils;
|
|
|
|
public class SuspendWithInterruptLock {
|
|
static volatile boolean done;
|
|
|
|
public static void main(String[] args) throws Exception {
|
|
Thread yielder = Thread.ofVirtual().name("yielder").start(() -> yielder());
|
|
Thread stateReader = Thread.ofVirtual().name("stateReader").start(() -> stateReader(yielder));
|
|
Thread suspender = new Thread(() -> suspender(stateReader));
|
|
suspender.start();
|
|
|
|
yielder.join();
|
|
stateReader.join();
|
|
suspender.join();
|
|
}
|
|
|
|
static private void yielder() {
|
|
int iterations = 100_000;
|
|
while (iterations-- > 0) {
|
|
Thread.yield();
|
|
}
|
|
done = true;
|
|
}
|
|
|
|
static private void stateReader(Thread target) {
|
|
while (!done) {
|
|
target.getState();
|
|
}
|
|
}
|
|
|
|
static private void suspender(Thread target) {
|
|
while (!done) {
|
|
suspendThread(target);
|
|
sleep(1);
|
|
resumeThread(target);
|
|
// Allow progress
|
|
sleep(5);
|
|
}
|
|
}
|
|
|
|
static void suspendThread(Thread t) {
|
|
try {
|
|
JVMTIUtils.suspendThread(t);
|
|
} catch (JVMTIUtils.JvmtiException e) {
|
|
if (e.getCode() != JVMTIUtils.JVMTI_ERROR_THREAD_NOT_ALIVE) {
|
|
throw e;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void resumeThread(Thread t) {
|
|
try {
|
|
JVMTIUtils.resumeThread(t);
|
|
} catch (JVMTIUtils.JvmtiException e) {
|
|
if (e.getCode() != JVMTIUtils.JVMTI_ERROR_THREAD_NOT_ALIVE) {
|
|
throw e;
|
|
}
|
|
}
|
|
}
|
|
|
|
static private void sleep(long millis) {
|
|
try {
|
|
Thread.sleep(millis);
|
|
} catch (InterruptedException e) {}
|
|
}
|
|
}
|
|
|